Doctrine\MongoDB\Aggregation\Stage\Operator::__construct PHP Method

    public function __construct(Builder $builder)
    {
        parent::__construct($builder);
        $this->expr = $builder->expr();
    }

 /**
  * {@inheritdoc}
  */
 public function __construct(Builder $builder)
 {
     parent::__construct($builder);
     $this->expr = $builder->expr();
 }